435 studies
THC Research
Studies on delta-9 THC: how it acts in the body, dosing, tolerance, impairment and medical uses. Each paper has a plain-English summary and the original abstract.
These cards summarize studies. They are not a statute table. Federal dates and a state-by-state table for delta-8 are in Is Delta-8 Legal? Federal Dates and a State-by-State Table .
Latest THC studies
Observational Observational
Yesterday
Alcohol and cannabis co-use altered task performance and brain activity
THC
Read Summary of Alcohol and cannabis co-use altered task performance and brain activity
Research Research
Yesterday
Pub swabs found drug residues at all touchpoints; bathrooms had cocaine traces
THC
Read Summary of Pub swabs found drug residues at all touchpoints; bathrooms had cocaine traces
Review Review
4 days ago
Review finds cardiovascular concerns, but causation remains unproven
THC CBD Mental Health
Read Summary of Review finds cardiovascular concerns, but causation remains unproven
Research Research
4 days ago
A small trial finds acute cannabis effects vary by sex and use frequency
THC Addiction
Read Summary of A small trial finds acute cannabis effects vary by sex and use frequency
Review Review
5 days ago
Perspective argues controlled and naturalistic cannabis studies answer…
THC
Read Summary of Perspective argues controlled and naturalistic cannabis studies answer…
Research Research
5 days ago
After legalization, average impairment did not significantly increase in this…
THC Mental Health Addiction
Read Summary of After legalization, average impairment did not significantly increase in this…
Research Research
6 days ago
A rapid mass-spectrometry test identified most cannabis samples, with…
THC
Read Summary of A rapid mass-spectrometry test identified most cannabis samples, with…
Research Research
1 weeks ago
In injured drivers, THC was linked to modestly higher culpability odds
THC
Read Summary of In injured drivers, THC was linked to modestly higher culpability odds
Research Research
1 weeks ago
Australian approvals rose, with THC products more common in older youth
THC CBD Pain
Read Summary of Australian approvals rose, with THC products more common in older youth
Research Research
1 weeks ago
Rat study finds CBD and THC effects on seizure-related oxygen loss vary
CBD THC Epilepsy
Read Summary of Rat study finds CBD and THC effects on seizure-related oxygen loss vary
Research Research
1 weeks ago
In 51 patients with schizophrenia, cannabis use showed no robust link to brain…
THC CBD Mental Health
Read Summary of In 51 patients with schizophrenia, cannabis use showed no robust link to brain…
Research Research
1 weeks ago
California youth reporting fewer use opportunities also reported less cannabis…
THC
Read Summary of California youth reporting fewer use opportunities also reported less cannabis…
Research Research
1 weeks ago
West Virginia ED screens show fentanyl often missed by traditional opiate tests
THC
Read Summary of West Virginia ED screens show fentanyl often missed by traditional opiate tests
Research Research
1 weeks ago
In a lab study, cannabis did not increase later cigarette or vape use
THC
Read Summary of In a lab study, cannabis did not increase later cigarette or vape use
Research Research
1 weeks ago
Standard and fast-acting edibles showed similar physiological patterns
THC
Read Summary of Standard and fast-acting edibles showed similar physiological patterns
Research Research
1 weeks ago
Earlier recreational sales linked to more AF, heart failure and MI admissions
THC
Read Summary of Earlier recreational sales linked to more AF, heart failure and MI admissions
Research Research
1 weeks ago
Breast milk immune markers tracked age; cannabis-only use showed no…
THC CBD
Read Summary of Breast milk immune markers tracked age; cannabis-only use showed no…
Research Research
2 weeks ago
In rats, THC attenuated brain changes linked to a high-fructose diet
THC Inflammation Neuroprotection
Read Summary of In rats, THC attenuated brain changes linked to a high-fructose diet
Research Research
2 weeks ago
Two chromatography columns reveal different patterns for separating THC isomers
THC CBD
Read Summary of Two chromatography columns reveal different patterns for separating THC isomers
Review Review
2 weeks ago
Review links declining endocannabinoid activity to brain ageing; human…
Endocannabinoid THC Neuroprotection
Read Summary of Review links declining endocannabinoid activity to brain ageing; human…
Research Research
2 weeks ago
Israeli registry study finds sex differences in cannabis use and reported…
THC CBD Pain
Read Summary of Israeli registry study finds sex differences in cannabis use and reported…
Research Research
2 weeks ago
In a Swiss 18-month study, THC exposure—not purchase volume—tracked with…
THC Mental Health
Read Summary of In a Swiss 18-month study, THC exposure—not purchase volume—tracked with…
Research Research
2 weeks ago
Observational study links late-pregnancy THC exposure with behavioral scores
THC Mental Health
Read Summary of Observational study links late-pregnancy THC exposure with behavioral scores
Review Review
2 weeks ago
Review finds limited bruxism evidence; no cannabinoid trial used polysomnography
CBD THC Sleep
Read Summary of Review finds limited bruxism evidence; no cannabinoid trial used polysomnography
Research Research
2 weeks ago
NOTICE assessment aligned with biomarkers of prenatal cannabis exposure
THC
Read Summary of NOTICE assessment aligned with biomarkers of prenatal cannabis exposure
Research Research
2 weeks ago
THC use in youth remains uncertain as long-term safety evidence is limited
THC CBD Mental Health
Read Summary of THC use in youth remains uncertain as long-term safety evidence is limited
Case Study Case Study
2 weeks ago
A case report links postoperative THC vaping to thumb replant failure
THC Endocannabinoid
Read Summary of A case report links postoperative THC vaping to thumb replant failure
Research Research
2 weeks ago
Placental study links pregnancy cannabis exposure with signaling and…
THC Endocannabinoid
Read Summary of Placental study links pregnancy cannabis exposure with signaling and…
Research Research
2 weeks ago
UK police-seized edibles showed inaccurate THC doses and misleading packaging
THC
Read Summary of UK police-seized edibles showed inaccurate THC doses and misleading packaging
Research Research
3 weeks ago
Ultra-low-dose THC reduced anxiety-like behavior in stressed mice
THC Anxiety Mental Health
Read Summary of Ultra-low-dose THC reduced anxiety-like behavior in stressed mice
Research Research
3 weeks ago
Rat study finds sex-specific fetal growth and placental gene changes
THC
Read Summary of Rat study finds sex-specific fetal growth and placental gene changes
Research Research
3 weeks ago
Older adults use cannabis for sleep, but targeted evidence remains scarce
Sleep THC CBD
Read Summary of Older adults use cannabis for sleep, but targeted evidence remains scarce
Research Research
3 weeks ago
An art exhibition increased HCC knowledge, but its impact versus other…
THC
Read Summary of An art exhibition increased HCC knowledge, but its impact versus other…
Research Research
3 weeks ago
Rat model links THC vapor exposure with altered pregnancy and pup growth
THC
Read Summary of Rat model links THC vapor exposure with altered pregnancy and pup growth
Research Research
3 weeks ago
National surveys found rising Delta-8 awareness and higher ever-use where…
THC
Read Summary of National surveys found rising Delta-8 awareness and higher ever-use where…
Research Research
3 weeks ago
Lab heating rapidly converted CBDA but found no meaningful THC buildup
CBD THC
Read Summary of Lab heating rapidly converted CBDA but found no meaningful THC buildup
Research Research
3 weeks ago
In mice, THC lowered observed seizure severity but caused marked sedation
THC CBD Epilepsy
Read Summary of In mice, THC lowered observed seizure severity but caused marked sedation
Review Review
3 weeks ago
Cancer lab findings have not established cannabinoids as disease-modifying…
Cancer THC CBD
Read Summary of Cancer lab findings have not established cannabinoids as disease-modifying…
Research Research
3 weeks ago
Prenatal edible THC linked to brain and behavior changes in macaques
THC Mental Health
Read Summary of Prenatal edible THC linked to brain and behavior changes in macaques
Review Review
4 weeks ago
Review finds mixed evidence on cannabis and tobacco co-use effects
THC Mental Health
Read Summary of Review finds mixed evidence on cannabis and tobacco co-use effects
Review Review
Oct 2026
Review finds promise in acidic cannabinoids, but human benefits remain unproven
THC CBD Epilepsy
Read Summary of Review finds promise in acidic cannabinoids, but human benefits remain unproven
Research Research
Oct 2026
A cancer-pain case report raises concern about THC/CBD with opioids
THC CBD Pain
Read Summary of A cancer-pain case report raises concern about THC/CBD with opioids
Research Research
Oct 2026
A test-track pilot will assess in-vehicle detection of cannabis impairment
THC
Read Summary of A test-track pilot will assess in-vehicle detection of cannabis impairment
Research Research
Oct 2026
New tools link transient gene expression with metabolite profiling in cannabis
THC
Read Summary of New tools link transient gene expression with metabolite profiling in cannabis
Review Review
Sep 2026
Review links Sierra Leone’s Kush crisis to health harms and under-resourced care
THC Addiction Mental Health
Read Summary of Review links Sierra Leone’s Kush crisis to health harms and under-resourced care
Research Research
Sep 2026
Retrospective study links cannabis use to modestly higher anaesthetic doses
THC
Read Summary of Retrospective study links cannabis use to modestly higher anaesthetic doses
Research Research
Sep 2026
A single fatal case links high-potency cannabis use with cardiac collapse
THC
Read Summary of A single fatal case links high-potency cannabis use with cardiac collapse
Research Research
Sep 2026
Rat study finds salivary gland injury after cannabis nanoemulsions
CBD THC
Read Summary of Rat study finds salivary gland injury after cannabis nanoemulsions
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